Steam-trap.



lu/vanto@ @mw O 1 9 .0, 1I.. LLM C 0 d C t 11.. nv t nu P Ta G. @L A. E.RAKESTRAW.

STEAM TRAP,

APPLICAHON FILED 11m24.191s.

www@

THOMAS Gr. RAKES'IRAW AND ARTHUR E. BAKESTRAW, OF DETROIT, MICHIGAN,ASSIGNORS OF ONE-FOURTH TO CHARLES C. CANNY, OF DETROIT, MICHIGAN.

STEAM-TRAP.

Specification of Letters Patent.

Patented oet. 15, 191s;

Application filed January 24, 1918. Serial N o. 213,474.

To all whom t may concern:

Be it known that we, THOMAS G. RAKE- s'rRAw and ARTHUR E. RAKnsTRAw,citizens of the United States, residing at Detroit, county of Vayne,State of Michigan, have invented a certain new and useful Improvementin-Steam-'Irapa and declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it pertains to make and use the same, reference being had tothe accompanyingV drawings, which form a part of this specification.

Our invention relates to steam traps shown in the accompanying drawingsand more particularly described in the followingspecification andclaims.

One of the objects of this invention is to simplify the generalconstruction of apparatus of this description by dispensing with manyparts common to the operation of the type of trap employing tiltingtanks, which when actuated serve to operate its inlet and dischargevalves.

One feature of the invention is the vertical alternating movement of therespective tanks and valves controlling the delivery of water and steamand discharge therefrom, thereby eliminatinov many of the rocking partsnecessary to the action of the tilting type of trap.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes may be made inthe precise embodiment herein described without departing from thespirit of the invention.

In the accompanying drawings Figure 1 is a longitudinal verticalsectional view on line 1-1 of Fig. 2.

Fig. 2 is a cross-sectional view on line 2-2 of Fig. l.

Referring now to the letters of reference placed upon the drawings:

A, denotes a suitable base plate, from which rises a standard B.

C, indicates a rocking arm pivoted to the upper end of the standard.

D, D, indicates a pair of vertically movable tanks connected to theJrocking arm by links d.

E, denotes a reciprocating sleeve valve secured to the under side ofeach tank at one end, for controlling the delivery of water to and fromthe tanks.

F, indicates the valve cylinder or casing, bolted to the base-plate.

G, is a pipe having branches leading'to each valve cylinder forconducting thereto the water of condensation from a heating system orother condensing surface (not shown).

G, is a check valve adapted to close against the return of the water tothe heating system.

H, is a discharge pipe having branches connected with the outlet port ofthe cylinder for conducting the water from the trap to the boiler (notshown).

I, I, denote reciprocating steam valves similar in construction tothewater valves E.

J, J, are the cylinders or casings of said valves secured to the baseplate.

K, indicates a pipe having branches leading to the inlet port of eachsteam valve connecting the steam space of the boiler therewith. K', isan exhaust pipe provided with similar branches, leading to the exhaustports of the steam valve. L, denotes the usual pipe extending upwardlyfrom the steam valve within the tank to deliver steam above the waterlevel therein.

M, is an expansion ring ittedto both the steam and water valves, adaptedto seal the respective'ports in the valve cylinders upon the valveregistering therewith. N, is a suitable packing nut fitted to each valvecylinder to insulte against leakage around the valve.

I-Iaving indicated the several parts by reference letters theconstruction and operation of the apparatus will be readily understood.

The trap having been installed at a suitable altitude above the boiler,and the several pipe connections between the heating system and thetrap, and between the trap and boiler common to apparatus of thischaracter being properly made-condensaion from the heating system ispermitted to enter the elevated tank of the trap. Upon the latterfilling with' water suliciently to overcome the weight of the depressedtankthe elevated tank descends, opening thereby the discharge portthrough the water valve to the boiler, and simultaneously with theopening of the steam inlet port through the `steam valve,- .Steam havingbeen thus admitted to the tank, the pressure therein is balanced Withthe boiler pressure permitting the water to flow from the tank bygravity to the bo-iler.

While the water is discharging from one tank into the boiler, water fromthev condensing system (not shown) enters the other tank in the mannerjust described until its weight again causes the tank to descend therebyforcing the other tank upwardly through the action of the tilting leverC. The steam valve being shifted through the upward movement of thetank, boiler pressure is thereby cut o and thel exhaust port opened torelieve vthe tank of all pressure, that the water of condensation mayagain enter the tank through valve at its opposite end. l

It will now be apparent that Water is alternately discharged by one tankWhile the other is receiving water from the condensing system, the waterbeing discharged by gravity into the boiler through the alternateadmission to the tanks of steam to balance the boiler pressure.

`Having thus described our invention, what We claim is l. In anapparatus of the character described, a base, a relatively long standardrising from the base, a substantially V- shaped lever pivotedintermediate its ends to the upper end of said standard for rockingmovement thereon, pairs of cylindrical casings rising from the base,Lipper and lower pipes connecting the casings .of each pair andcommunicating therewith, ran inlet pipe connecting the upper pipes, anexhaust pipe connected to the lovver pipes, a vcylindrical ported valvemounted for reciprocating movement in each of said casings, tanksrigidly connected to the valves of opcontrolled.

2. In an apparatus of the character described, a base, a relatively longstandard rising from the base, a rocking lever pivoted to the upper endof the standard, a pair of vertically movable tanks connected to saidlever, a pair of sleeve valves rigidly Vconnected With the tanks adaptedto control' the alternate delivery and discharge of- Water to and fromthe tanks, a pair of sleeve valves rigidly connected with the tanksadapted to alternately deliver steam tothe tankand relieve the pressuretherein, valve casings for the respective valves mounted on the baseplate and constructed to restrict the valve sleeves to a straight, upandVv down vertical movement and thereby restrict-the tanks to astraight up and down movement, the said casings having inlet anddischarge ports controlled by said valves, and suitable pipe connectionsleading to and from the respective valve casings and connected to theinlet and discharge ports thereof for the delivery and discharge ofwater and also of; steam and the relief of pressure in the ftanksL Intestimony whereof we sign this specification in the presence of twowitnesses.V

THOMAS G. RAKESTRAW. i ARTHUR E. RAKESTRAW.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

` Washington, D. C.

